質å 2019å¹´4æ18æ¥æ¨ææ¥ 13:15 ã©ãªãããææãé¡ããããã¾ãã DataTableãLINQã使ç¨ã㦠ã»ã°ã«ã¼ãå(2ã¤ã®ã«ã©ã ã§è¡ããã) ã»Sumã¡ã½ããã§åè¨ãã ã»ä¸¦ã¹æ¿ããè¡ã ãå®ç¾ãããã¨èãã¦ãã¾ãã ã¡ã½ããå¼ã®è¨è¿°ãç¥ãããã§ãã (ã¯ã¨ãªå¼ããåããã¦æãã¦ããã ããã°æ´ã«ãããããã§ãã) 以ä¸ã®ãããªDataTableããã£ãã¨ãã¦ã - Dim dt As DataTable = New DataTable() dt.Columns.Add("date") dt.Columns.Add("name") dt.Columns.Add("count") Dim dr = dt.NewRow() dr("date") = "2018/02/02" dr("name") = "PPP" dr("count") = 5 dt.Rows.Add(dr) d
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